FIG. 4.

Auditory-attention study: The asymptotic nSFOAE responses to tone-plus-noise for triplet 1 for all subjects in the auditory study. The values shown began as means across thirty-five 10-ms analysis windows beginning at 250 ms into the 300-ms nSFOAE-eliciting stimulus within one block of trials (i.e., at response asymptote); those individual means then were averaged across at least four such blocks. The differences between inattention and attention were in one direction for the five subjects at the left of the figure, and in the other direction for the remaining three subjects. Standard errors of the mean were 0.73 dB, on average. The level of the noise floor of our measurement system at 4.0 kHz was about −13.0 dB SPL (see footnote 2).